Baron, Robert A.
Allyn and Bacon, 1987
Buku Teks
Baron, Robert A.
Allyn and Bacon, 1994
Buku Teks
DeLamater, John D.
Colorado Westview Press, 2014
Buku Teks
Baron, Robert A.
Pearson, 2009
Buku Teks
Franzoi, Stephen L.
McGraw-Hill, Higher Education, 2009
Buku Teks